Convergence of random variables Flashcards

1
Q

What is the Markov Inequality lemma?

A
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2
Q

Prove the following lemma.

A
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3
Q

Define converges pointwise or surely.

A
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4
Q

Define converges to X in probability.

A
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5
Q

Define converges to X almost surely.

A
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6
Q

Define converges to X in the mean or in L1.

A
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7
Q

Define converges in Lr.

A
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8
Q

What are the main four types of convergence?

A
  1. In probability
  2. Almost surely
  3. In the mean/ in L1
  4. In Lr
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9
Q

What does the term almost surely mean?

A

It means that something occurs excpet on an event with probability zero.

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10
Q

What is convergence in probability similar to?

A

Convergence almost surely - except it is weaker

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11
Q

What is the sum convergence lemma?

A
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12
Q

Prove the following lemma.

A
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13
Q

What is the lemma about convergence in Lr and convergence in probabiliity?

A
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14
Q

Prove the following lemma.

A
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15
Q

What is the lemma about convergence in probability and convergence almost surely?

A
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16
Q

Prove the following lemma.

A
17
Q

Does the converse to this lemma apply?

A

No - convergecne in probability does not imply convergence in L1 or Lr.

18
Q

Does the converse to this lemma apply?

A

No - convergence in probability does not imply convergence almost surely

19
Q

What is the weak law of larger numbers theorem?

A
20
Q

Prove the following theorem.

A
21
Q

Why is the weak law of large numbers called weak?

A

Because the convergence is in probability

22
Q

Why is the strong law of large numbers called strong?

A

The convergence is almost sure

23
Q

What is the Cauchy-Schwarz theorem?

A
24
Q

Prove the following theorem.

A
25
Q

What is the strong law of large numbers theorem?

A
26
Q

Prove the following theorem.

A
27
Q

What is the Monotone Convergence theorem?

A
28
Q

What are three important remarks of the following theorem?

A
29
Q

What is a corollary to the following theorem for nonnegative decreasing sequences?

A
30
Q

Prove the following corollary.

A
31
Q

What is the Dominated Convergence theorem?

A
32
Q

What is the bounded convergence theorem corollary?

A
33
Q

Prove the following corollary.

A
34
Q

What is Fatou’s Lemma?

A
35
Q

Prove the following Lemma.

A
36
Q
A